Hose coupling



Aug. 20, 1940. JOSEPH 2,211,978

no sE COUPLING Filed Dec. 5, 1938 mun I /3 (72 76 INVENTOR W055: HEN/w JOJEPH ATTORNEYS Patented Aug. 20,1940 7 UNITED STATES PATENT OFFICE HOSE COUPLING Moses Henry Joseph, Woodmerc, N. Y., assignor to United Metal Hose Company, Inc., Long:

Island City, N. Y., a corporation of New York 7 Application December 1938, Serial lNo. 243,946

4 Claims. (Cl. 285-86) 'This invention relates to improvements'in coupling members for hose, and more particularly relates to coupling members to be applied to flexible hose, for example, of the type used on attached;

liquid fuel dispensing pumps. The coupling member may also be applied to flexible metal hose, both with and without outer or inner coverings of fabric, rubber or the like, and is especially adapted for the type of flexible hose havof this specification, wherein I have shown a preferred embodiment of myinvention for the purpose of illustrating the principles thereof, -Fig. 1 is a side view of a conventional fuel delivery pump for internal combustion engine fuels, showing the manner iuwhich the delivery hose is tional view showing the hose and at- Fig. 21s a lo itudinal the coupling member applied tached to the delivery nozzle;

the pipe.-

Fig. .3 is a cross section on line H of Fig. 2.

Referring to the drawing, in Fig. 1 is shown a gasoline pump ll having a delivery outlet 12 leading to an elbow it having threads ll, to which the coupling member may be. screwed.

For purposes of illustration the invention is shown as-appliedto 'a coupling of the tim disclosed in Levitt Patent No. 1,637,701, but othertypes of coupling may be used. The coupling a portion S I a diameter which may prefing an outside cover of rubber or any compound member in its preferred form includes an outer 10 affected by liquid being conveyed. v sleeve l5 and a coupling nut ii. The outer end Various types of couplings for hose have here-, of the bore of the sleeve is provided with a hosetofore been proposed, which are said to be parengaging portion I1 and the inner end thereof, ticularly adapted to fuel-dispensing hose conwhich is of greater diameter than the outer end, sisting of various means which supply a substanis provided with an internal thread, it. Inter- 15 tially liquid-tight joint between the hose and the mediate its inner -and outer portions the bore, coupling member. These heretofore proposed is provided with a tapered portion is adapted coupling members have suifered under numerous to receive and engage the gripping member heredisadvantages, in that in many cases they are inafter described. not adapted for use with flexible'hose, so that the The coupling nut I6 is preferably. provided at 20 useful life of the hose is considerably shortened its outer end with a threaded portion 25, which by the damage done by application of the coumay be adapted to connect with any desired duct pling member. Further disadvantage has existed member, nozzle or the like'and is here shown as in previously proposed coupling members for being attached to the delivery member it of the flexible hose in that-insuflicient provision ismade pump ll. As shown the portion 25 is externally 25 for avoiding the damage caused by thread seepthreaded andscrews into an internally threaded age or the like at the point where the hose is conportion of the member l3, but obviously any other nected to the gasoline pump. suitable formz of connection may be used. The It is an object of this invention to provide a nut Ills provided with outer and inner sleeves substantially tight hose coupling which does not 26 and 21, the outer sleeve being externally 30 involve any damaging wear and tear on the end threaded, and the inner sleeve being preferably of the hose "engaged and which makes provision of greater .length than the outer sleeve. The for removal of the danger from possible seepage two sleeves are so spaced that the end of the of the fuel or other liquid at the point of conhose is adapted to be inserted therebetween with nection of the hose to the source of liquid. Such relative sn'ugnecs, abutting against the shoulder 35 provision is necessary, since the liquid delivered 28, which is preferably integral with the two in such hose very often has a damaging effect on sleeve portions, joining them together. the outside wall of the hose if it comes in contact The coupling further includes a gripping memtherewith. ber 29 comprising a helical coil formed of wire, I

It is a further object of this invention to prothe inner diameter ofthe coil being substantially 4'0 vide a hose coupling which shall have an internal equal to the outer diameter of the hose to which supporting sleeve integral with the coupling the coupling is to be applied. The gripping memmember which prevents the collapse of the hose her which ispreferably, but not necessarily, format the engaging point of the coupling.- ed of spring wire may be formed. before being -In the accompanying drawing forminga part applied to the hose, or it may be applied to the 5o tendto be more tightly coiled upon for the purpose of attaching a flexible hose to,

a delivery pump for liquid fuels, it is desirable to make provision for keeping possible seepage from the joint between the coupling and pump from coming in contact with the outside wall of the hose. This necessity arises from the fact that the volatile type petroleum fuels which are commonly used peptize the rubber or other covering of the hose with comparative ease, and

were this condition allowed to persist, the useful life of the hose would be considerably shortened. Even though the coupling is apparently tightly screwed to the pump connection it has been found that a small amount of seepage is likely to take place through the threads of the screw joint.

I have discovered that by making provision for a zone of evaporation of this small seepage, I can prevent the damage to the outside wall of the hose and thus increase the life of the en-,

tire unit. Any suitable provision for a zone of evaporation which is adapted to entrap the small amount of fuel seeping between the threaded portions l4 and 25 or between a similar attachment, may be used. My preferred form, however, comprises an annular trough or depression 3| formed in the upper surface of the shoulder portion 30. When the threads l4 and 25 are machined with reasonable care, only a small amount of fuelwill seep through onto the shoulder 30, and this will be entrapped in the trough 3|, where, due to the volatility. of the fuel, it will evaporate before it is able to flow over the shoulder 30 and thus down the outside wall of the sleeve IS onto the hose 20. By these means I am able to prevent the destruction of the hose by the peptizing effect of the seeping fuel. This feature of my invention relating to the provision of an evaporation reservoir is obviously. applicable to any type of hose coupling, the form shown being merely illustrative.

As heretofore explained, a coupling nut is provided with an inner metallic sleeve 21, which ance against leakage of the liquid contained in the hose around the end of the hose and through the portion engaged by the gripping member. I have found that distinct advantages arise from forming the coupling nut and sleeve 21 integral therewith, in that no matter how long the hose couplings may be used or to what rough use it may be put, no leakage can possibly occur around the irmer sleeve as would occur in-the case of a thimble or the like inserted in the coupling nut and the hose for the purpose of support. For ease in application, I have found it preferable to round off the walls of the sleeve 21 at its lower extremity 33.

While I have illustrated and described in detail certain preferred forms of my invention, it is to be understood that changes may be made therein and the invention embodied in other structures. I do not, therefore, desire to limit myself to the specific constructions illustrated. but intend to cover my invention broadly in whatever form its principle may be utilized.

I claim:

1. In combination, a liquid delivery pump having a delivery outlet; a hose, and a hose coupling unit connecting said hose to said outlet, said unit comprising 'a hose-gripping zone, a pump-connecting zone, and an evaporation zone intermediate the two, first-mentioned zones, said evaporation zone having located therein a reservoir wherein any liquid escaping through said pumpconnecting zone will flow and evaporate before reaching the outer wall of said hose.

2. The combination as claimed in claim 1, wherein the evaporating zone comprises a circumferential laterally-extending portion, and an annular groove formed therein adapted to entrap any seepage of fluid escaping from, said pump-connecting zone.

3. In a hose coupling, a coupling nut comprising an integral member, having on the inner side thereof a pair of sleeves between which a hose may be inserted, a circumferential laterally extending portion forming between the sleeves an annular shoulder and externally of the shoulder an engaging nut, and on the outer side thereof a threaded connecting portion, means located on the outer lateral surface of said engaging nut for entrapping seeping fluid, said means comprising an annular trough in said surface.

4. A coupling member for flexible hose including a hose gripping zone, a zone for connecting to a delivery outlet and means situated between said zones for entrapping seepage fluid, said means including a reservoir wherein seepage fluid is harmlessly evaporated.

MOSES HENRY JOSEPH. 

